/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/conformance/controlFlow/controlFlowInOperator.ts ===
declare function AssertType(value:any, type:string):void;
const a = 'a';
AssertType(a, "string");
AssertType('a', "string");

const b = 'b';
AssertType(b, "string");
AssertType('b', "string");

const d = 'd';
AssertType(d, "string");
AssertType('d', "string");

type A = { [a]: number; };
type B = { [b]: string; };

declare const c: A | B;
AssertType(c, "union");

if ('a' in c) {
    c;      // A
AssertType(c, "A");

    c['a']; // number;
AssertType(c['a'], "number");
AssertType(c, "A");
AssertType('a', "string");
}

if ('d' in c) {
    c; // never
AssertType(c, "(union) & Record<"d", unknown>");
}

if (a in c) {
    c;    // A
AssertType(c, "A");

    c[a]; // number;
AssertType(c[a], "number");
AssertType(c, "A");
AssertType(a, "string");
}

if (d in c) {
    c; // never
AssertType(c, "(union) & Record<"d", unknown>");
}


